Firing a gun in space plays out very differently from that on Earth due to some bizarre physics. Here's everything that ...

Gravity not only holds us firmly to the ground but also anchors oceans, keeps the atmosphere in place, and binds planets and ...

Earth's history is marked by violent mass extinctions that have shaped life on the planet. Here's how the five mass ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Our first meeting was a bit awkward. One of us is an ...

Mars is known for its barren desert landscape and dry climate. But two recent studies in the journals Nature and Science go ...